摘要：Nuclear safety is a global growing concern,where ionizing radiation(IR)is a major injury factor resulting in serious damage to *** detection of IR is usually conducted with physical dosimeters;however,biological IR detection methods are ***,a living composite hydrogel consisting of engineered bacteria and gelatin/sodium alginate was 3D-printed for the biological detection of *** strains of PrecA::egfp gene circuit-containing engineered Escherichia coli were constructed with IR-dependent fluorescence,and the DH5αstrain was finally selected due to its highest radiation response and *** bacteria were loaded in a series of gelatin/sodium alginate matrix hydrogels with different rheology,3D printability and bacterial applicability.A high-gelatin-content hydrogel containing 10%gelatin/1.25%sodium alginatewas *** optimal living composite hydrogelwas 3D-printedwith the special bioink,which reported significant green fluorescence underγ-ray *** living composite hydrogel provides a biological strategy for the detection of environmental ionizing radiation.

摘要：以苏州中心城区为研究范围,归纳总结流动摊贩的宏观区位分布特征、微观空间占用特征、中观空间依附特征及其“空间—行动”逻辑;基于多源数据,运用相关性分析及多元线性回归分析方法,分析流动摊贩空间分布机制。结果显示:购物消费类设施密度、交通可达性、交叉口密度、街道设施密度、出入口密度等5个因子是影响流动摊贩聚集性的主要因素。基于研究结论,提出空间转向的治理思路和治理策略,包括制定合理的摊区专项规划、加强城市设计、建立数字化平台、鼓励多元互动治理等,从而更好地约束和引导流动摊贩,推进城市高质量发展。

摘要：舞钢1260 m3高炉采用转鼓过滤法渣处理工艺,该系统自投产以来,出现返渣管道堵管、转鼓分配器堵塞、粒化塔检修口溢渣、热水池底部积渣、溢流管大量渣水外排等一系列问题,严重影响了高炉正常生产。作为设计者和现场调试者,归纳总结了该系统的改进措施及改进效果。

摘要：风口小套是高炉的关键设备,是热交换极为强烈的冷却元件,其在高温状态下不间断地受到液态渣铁和煤粉的冲刷,是高炉易损的设备。风口小套的破损与更换已成为高炉无计划休风增多的主要原因,针对如何优化风口小套供水条件来提高风口小套使用寿命,进行探讨。

摘要：根据我国热磨机开发设计和使用维修情况,对中密度纤维板生产热磨制浆中出现的故障进行总结,分析故障产生的原因,并提出相应解决办法。

摘要：Electrolytes are widely considered as a key component in Li–O;batteries (LOBs) because they greatly affect the discharge-charge reaction kinetics and ***,we report that 1,3-dimethyl-2-imidazolidinone (DMI) is an excellent electrolyte solvent for *** with conventional ether and sulfone based electrolytes,it has higher Li_(2)O_(2)and Li_(2)CO_(3)solubility,which on the one hand depresses cathode passivation during discharge,and on the other hand promotes the liquid-phase redox shuttling during charge,and consequently lowers the overpotential and improves the cyclability of the ***,despite the many advantages at the cathode side,DMI is not stable with bare Li ***,we have developed a pretreatment method to grow a protective artificial solid-state electrolyte interface(SEI) to prevent the unfavorable side-reactions on *** SEI film was formed via the reaction between fluorine-rich organic reagents and Li *** is composed of highly Li^(+)-conducting Li_(x)BO_(y),LiF,Li_(x)NO_(y),Li_(3)N particles and some organic compounds,in which Li_(x)BO_(y)serves as a binder to enhance its mechanical *** the protective SEI,the coulombic efficiency of Li plating/stripping in DMI electrolyte increased from 20%to 98.5%and the fixed capacity cycle life of the assembled LOB was elongated to205 rounds,which was almost fivefold of the cycle life in dimethyl sulfoxide (DMSO) or tetraglyme(TEGDME) based *** work demonstrates that molecular polarity and ionic solvation structure are the primary issues to be considered when designing high performance Li–O;battery electrolytes,and cross-linked artificial SEI is effective in improving the anodic stability.

摘要：犁的作业效果随其工作部件——犁铲或犁铧设计思想而不同。中国和欧美的犁铲结构从原始犁时期就截然不同。中国的耒耜工作面设计的是凸形,欧州的原始犁(暂称为树干犁)的工作面设计是凹形的。这一差异随各自犁的进展,经过近20个世纪,一直到现在还是存在的。本文比较了它们各自的原始犁、中世纪的犁以及现代犁的犁铲状态,并重点评价了其碎土原理以及作业的生态和经济效益。

摘要：The advancement in grazing incidence X-ray scattering(GIWAXS)techniques at synchrotron radiation facilities has significantly deepened our understanding of semiconducting ***,investigation of ultrathin polymer films under tensile conditions poses challenge,primarily due to limitations associated with the lack of suitable sample preparation methods and new stretching *** study addresses these limitations by designing and developing an in-situ temperature-controllable stretching sample stage,which enables real-time structural measurements of ultrathin polymer films at Beijing Synchrotron Radiation *** particular,we report,for the first time,in-situ GIWAXS results of representative semiconducting polymer thin films under variable-temperature *** research has overcome the limitations imposed by sample constraints,thus facilitating the achievement of valuable insights into the behavior of ultrathin polymer films under tensile *** changes in the molecular ordering and packing within the polymer thin films as a result of increasing applied strain and temperature have been *** study promotes future developments in the field,thus enabling the design and optimization of intrinsically stretchable electronic devices and other technologically relevant applications.

摘要：21世纪第一个十年中后期是国内外网络短视频发展的重要年份,包括YouTube、Dailymotion、***等在内的一批视频分享网站纷纷建立。与此同时,部分拥有海外互联网工作经验的创业者,也开始在中国筹划并组建独立于传统门户网站的视频分享网站。

摘要：针对大尺寸、异形炸药部件的安全分解问题,提出基于水射流技术的炸药安全分解技术的设计方案。根据炸药部件的结构特点和材料属性,建立水射流切割炸药部件的有限元数值仿真模型;通过分析炸药材料在不同水射流速度下切割过程、极限应力水平及损失情况,不断优化水射流速度,在确保形状复杂的炸药部件不被冲击引爆和几何结构不遭受彻底破坏情况下对炸药部件进行分解。分解后的炸药块保持形状完整,内部无损伤缺陷,能够为进一步分析炸药部件的物理化学性能提供有效样品。对厚度为75 mm的百千克级空心圆柱型炸药部件的实施分解试验,按照该设计方案最终获得优化后的水射流速度为293 m/s.试验结果证明,炸药分解设计方案可行,设计的分解装置通用性强,能够为安全分解大尺寸、大当量、复杂结构炸药部件提供有效的技术支持,具有一定的推广应用价值。